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Semiconductor Light Emitting Device - Patent 8115227

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Semiconductor Light Emitting Device - Patent 8115227 Powered By Docstoc
					
				
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Description: BACKGROUND The embodiment relates a semiconductor light emitting device. Group III-V nitride semiconductors are spotlighted as core materials of light emitting diodes (LEDs) or laser diodes (LDs) due to physical and chemical characteristics. The group III-V nitride semiconductors mainly comprise semiconductormaterials having a composition formula of In.sub.xAl.sub.yGa.sub.1-x-yN (0.ltoreq.x.ltoreq.1, 0.ltoreq.y.ltoreq.1, 0.ltoreq.x+y.ltoreq.1). The LED is a kind of a semiconductor device, which transmits/receives signals by converting electricity into infrared rays or light using the characteristic of the compound semiconductor and is used as a light source. The LED and LD employing such nitride semiconductors have been mainly used in light emitting devices to obtain light, and have been applied to various appliances (e.g., a light emitting part of a key pad of a portable phone, an electric bulletinboard, an illumination device) as a light source.SUMMARY The embodiment provides a semiconductor light emitting device comprising reflective electrode layers provided on/under a light emitting structure. The embodiment provides a semiconductor light emitting device comprising electrode parts having a plurality of openings on/under a light emitting structure. The embodiment provides a semiconductor light emitting device, in which chips can be die-bonded through four side walls or an angle of 360.degree. without using a wire by providing a passivation layer at the outside of the light emittingstructure. An embodiment provides a semiconductor light emitting device comprising: a light emitting structure comprising a plurality of compound semiconductor layers; a passivation layer at the outside of the light emitting structure; a first electrodelayer on the light emitting structure; and a second electrode layer under the light emitting structure. An embodiment provides a semiconductor light emitting device comprising: a light emitting structure comprising a first conductive s